Based on absolutely nowt other than the small amount of YouTube research ive crammed in over the last couple of days I'd go Hellberg.
Watched all the stuff on Still last night and he's an intriguing one...I wasn't as blown away by what I saw as others seem to have been, other than it would seem he'd be one who would be more than happy to work in the environment we're offering, which is key to be fair.
Such an important appointment this. They've had to make do based on circumstances thus far, this one needs to be someone they trust for the long haul. Exciting times.